Study on Quantitative Determination of Ellagic Acid by UV-spectrophotometry

A new method for determination of ellagic acid content by UV spectrophotometry was studied. The technical key was that test solution of ellagic acid was prepared with diluent NaOH solution to resolve the insolubility of ellagic acid in water and many organic solvents. UV absorption peak of the test solution was determined at 357 nm. The linear relationship between concentration and UV absorbance under test conditions was proved. The measuring error was estimated.Stability test of determined value was also studied. The results indicated that this method could be used for quantitative determination of ellagic acid in industrial production for its simplicity, low consumption of solvents, cheapness, veracity and stability.